Breakout/development board for ATtiny3217 and other 24-pin megaAVR ATtiny, Arduino compatibleDesigned by Azzy's Electronics in United States of America
Assembled board shown for reference only - this is the listing for the BARE BOARD Assembled boards with ATtiny3217 or ATtiny1607 are available my other listing This is a breakout board for the new ...Read More…
Assembled board shown for reference only - this is the listing for the BARE BOARD
This is a breakout board for the new ATtiny megaAVR x7 series - supports 3217, 1617, 817, 417, 1607, 807 - all the 24-pin megaAVR 1-series and 0-series ATtiny parts. These are highly capable and affordable ATtiny parts - prices are lower than most classic AVR ATtinys with the powerful megaAVR peripherals. These parts are fully compatible with Arduino using my megaTinyCore, too.
U1 ATtiny 3217, 1617, 817, 417, 1607 or 807
C1 1206 0.1uF Cap - decoupling
C2 1206 Output Cap for regulator and power supply filtering (4.7uF or as directed by regulator datasheet)
C3 (If using regulator) 1206 Input Cap for regulator (4.7uF or as directed by regulator datasheet)
C4 Do Not Use
R1 1206 4.7k resistor
R2 Do Not Use
R3 1206 resistor (ballast for LED - 2.2k ~ 220 ohm depending on how bright you like your LEDs)
D1 Do Not Use
LED1 (optional) 1206 LED, this is connected to PA7 (Arduino pin 3) -
F1 (if using regulator) 1206 PTC fuse (1A max recommended, can replace with jumper if you like to live dangerously or your power supply is already current limited)
U2 (optional) 1117-series or compatible voltage regulator in SOT-223 package (Recommended: LDL1117)
Pin Header - 1x3 for UPDI header, 1x6 for FTDI serial header. 2 1x15 headers for the I/O pins - recommend normal square header for use with DuPont jumpers, or machined pin header for use with breadboard. All 0.1" pitch.
Power header (if using regulator) Your preferred 2-pin power connector (or wires to in-line connector), 0.1" pitch.
Note: Reference designators are missing from the top silkscreen in this version of the board. Refer to images as reference; part locations are:
U1, U2 - obvious
4 1206 parts between U1 and UPDI header (starting from closest to UPDI header) - LED1, R3, R1, C1
3 1206 parts in a row between regulator and FTDI header - F1, C2, C3
3 parts in corner near FTDI header - C4, R2, D1 - Do not use (this is for an autoreset circuit - this is only useful with serial bootloader and UPDI disabled (as it will prevent UPDI programming, such a bootloader will be introduced in a future version of megaTinyCore, but is not currently available)
Unlike other AVR microcontrollers, these new parts are programmed via a "UPDI" singlewire interface instead of the SPI-based ICSP protocol. You can easily use a standard Arduino Nano, Uno, or Pro Mini as a UPDI programmer, this is what we use and recommend - see the instructions here:
The order of the pins on the UPDI header is UPDI-Gnd-Vcc - this means that if the programmer is connected backwards, the board will not be damaged. The 4.7k resistor is on the breakout board; you do not need to (and should not) use another one.
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United States Postal Service: Economy (untracked, bare boards only)
The cheapest shipping option available, for bare boards within the United States only.
United States Postal Service: First Class Tracked (recommended, cheaper than economy for 5+ items)
United States Postal Service: Priority Mail - Flat rate (fastest, tracked)
Domestic shipping via USPS Priority Mail - USPS advertises 1~3 day shipping time within the continental United States. This is a flat rate for any quantity of items - this is your chance to buy piles of small cheap items like my mini prototyping boards without paying extra for shipping!
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